java上机实验3.doc

昆 明 理 工 大 学 理 学 院信息与计算科学专业 操作性实验报告年级： 10级 姓名： 刘陈 学号： 201011101128 指导教师： 朱志宁 实验课程名称： java程序设计 开课实验室： 理学院机房 实验成绩：学风(5)观察能力(15)操作能力(30)调试能力(50)其它总分实验内容：1实验/作业题目: 计算器2实验/作业课时：各2学时，共4学时 3实验过程(包括实验环境、实验内容的描述、完成实验要求的知识或技能)： 实验环境：eclipse 实验内容：编写一个简单的计算器，能实现如图所示的功能，利用面向对象的思想进行程序设计。 完成实验要求的知识或技能：通过这个实验，掌握java图形界面的设计、事件响应的操作和面向对象的编程思想。4程序结构(程序中的函数调用关系图)5算法描述、流程图或操作步骤：第一个CalcControler类：package Calculator;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JTextField;public class CalcControler implements ActionListener JTextField textField;String op1, op2, operator;String errMsg = Error;int state = 0;CalcControler(JTextField tf)textField = tf;public void actionPerformed(ActionEvent e)String s;s = e.getActionCommand();switch (state) case 0:inputState0(s);break;case 1:inputState1(s);break;case 2:inputState2(s);break;case 3:inputState3(s);break;case 4:inputState4(s);break;case 5:inputState5(s);break;default:System.out.println(Unknow state error!);System.exit(1);private boolean isDigit(String s) boolean b;b = s.equals(0) | s.equals(1) | s.equals(2) | s.equals(3)| s.equals(4) | s.equals(5) | s.equals(6)| s.equals(7) | s.equals(8) | s.equals(9);return b;private int fN(float fop1) int ruslt = 0;if (fop1 = 0 | fop1 = 1) ruslt = 1; else ruslt = (int) (fop1 * fN(fop1 - 1);return ruslt;private boolean isOperator(String s) return s.equals(+) | s.equals(-) | s.equals(*) | s.equals(/)| s.equals(x2) | s.equals(x3) | s.equals(xy)| s.equals(sqrt) | s.equals(sin) | s.equals(cos)| s.equals(tan) | s.equals(n!) | s.equals()| s.equals();private void inputState0(String s) if (isDigit(s) | s.equals(+/-) | s.equals(.) state = 2;textField.setText(0);inputState2(s);if (isOperator(s) op1 = 0;operator = s;state = 4;if (s.equals(1/x) textField.setText(errMsg);state = 1;private void inputState1(String s) if (isDigit(s) | s.equals(+/-) | s.equals(.) textField.setText(0);state = 0;inputState0(s); else state = 0;textField.setText(0);private void inputState2(String s) if (isDigit(s) String text = textField.getText();if (text.equals(0)text = s;elsetext = text + s;textField.setText(text);if (s.equals(.) String text = textField.getText();if (!text.contains(.) text = text + s;textField.setText(text);if (s.equals(+/-) String text = textField.getText();if (text.charAt(0) = -)text = text.substring(1);elsetext = - + text;textField.setText(text);if (isOperator(s) | s.equals(1/x) state = 3;op1 = textField.getText();inputState3(s);if (s.equals(=) state = 3;op1 = textField.getText();if (s.equals(C)textField.setText(0);if (s.equals(Backspace) String text = textField.getText();if (text.length() = 1)textField.setText(0);elsetextField.setText(text.substring(0, text.length() - 1);private void inputState3(String s) if (isDigit(s) | s.equals(.) op1 = ;textField.setText(0);state = 2;inputState2(s);if (s.equals(+/-) state = 2;op1 = ;inputState2(s);if (isOperator(s) operator = s;state = 4;if (operator.equals(x2) | operator.equals(x3)| operator.equals(sin) | operator.equals(cos)| operator.equals(tan) | operator.equals(sqrt)| operator.equals(n!) inputState6(s);if (s.equals(1/x) Float fOp1 = new Float(op1);if (fOp1.floatValue() = 0.0) state = 1;textField.setText(errMsg); else float f = 1.0f / fOp1.floatValue();op1 = String.valueOf(f);textField.setText(op1);if (s.equals(C) | s.equals(Backspace) state = 0;textField.setText(0);private void inputState4(String s) if (isDigit(s) | s.equals(+/-) | s.equals(.) textField.setText(0);state = 5;inputState5(s);if (isOperator(s)operator = s;if (s.equals(1/x) state = 3;operator = ;inputState3(s);if (s.equals(C) | s.equals(Backspace) state = 0;textField.setText(0);private void inputState5(String s) if (isDigit(s) String text = textField.getText();if (text.equals(0)text = s;elsetext = text + s;textField.setText(text);if (s.equals(.) String text = textField.getText();if (!text.contains(.) text = text + s;textField.setText(text);if (s.equals(+/-) String text = textField.getText();if (text.charAt(0) = -)text = text.substring(1);elsetext = - + text;textField.setText(text);if (isOperator(s) op2 = textField.getText();Float f1, f2;f1 = new Float(op1);f2 = new Float(op2);float fop1, fop2;fop1 = f1.floatValue();fop2 = f2.floatValue();if (operator.equals(+)fop1 = fop1 + fop2;else if (operator.equals(-)fop1 = fop1 - fop2;else if (operator.equals(*)fop1 = fop1 * fop2;else if (operator.equals(/) if (fop2 != 0.0f)fop1 = fop1 / fop2;else state = 1;textField.setText(errMsg);return; else System.out.println(Unknown operator error!);state = 1;textField.setText(errMsg);return;op1 = String.valueOf(fop1);textField.setText(op1);operator = s;state = 4;if (s.equals(1/x) op1 = textField.getText();state = 3;inputState3(s);if (s.equals(=) op2 = textField.getText();Float f1, f2;f1 = new Float(op1);f2 = new Float(op2);float fop1, fop2;fop1 = f1.floatValue();fop2 = f2.floatValue();if (operator.equals(+)fop1 = fop1 + fop2;else if (operator.equals(-)fop1 = fop1 - fop2;else if (operator.equals(*)fop1 = fop1 * fop2;else if (operator.equals(/) if (fop2 != 0.0f)fop1 = fop1 / fop2;else state = 1;textField.setText(errMsg);return; else if (operator.equals(xy)fop1 = (float) Math.pow(fop1, fop2);else System.out.println(Unknown operator error!);state = 1;textField.setText(errMsg);return;op1 = String.valueOf(fop1);textField.setText(op1);state = 3;if (s.equals(C) state = 0;textField.setText(0);if (s.equals(Backspace) String text = textField.getText();if (text.length() = 1)textField.setText(0);elsetextField.setText(text.substring(0, text.length() - 1);private void inputState6(String s) Float f1;f1 = new Float(op1);float fop1;fop1 = f1.floatValue();if (operator.equals(sqrt) if (fop1 0) textField.setText(errMsg);return; elsefop1 = (float) Math.sqrt(fop1); else if (operator.equals(x2)fop1 = fop1 * fop1;else if (operator.equals(x3)fop1 = fop1 * fop1 * fop1;else if (operator.equals(sin)fop1 = (float) Math.sin(fop1);else if (operator.equals(cos)fop1 = (float) Math.cos(fop1);else if (operator.equals(tan)fop1 = (float) Math.tan(fop1);else if (operator.equals(n!)fop1 = this.fN(fop1);op1 = String.valueOf(fop1);textField.setText(op1);第二个CalcultorFrame类：package Calculator;import java.awt.BorderLayout;import java.awt.Dimension;import java.awt.Frame;import java.awt.Menu;import java.awt.MenuBar;import java.awt.MenuItem;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;public class CalcultorFrame extends Frame private static final long serialVersionUID = 1L;CalcPanel panel;public CalcultorFrame() MenuBar menuBar = new MenuBar();Menu menuFile = new Menu();MenuItem menuFileExit = new MenuItem();menuFile.setLabel(File);menuFileExit.setLabel(Exit);menuFileExit.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) CalcultorFrame.this.windowClosed(););menuFile.add(menuFileExit);menuBar.add(menuFile);setTitle(Calculator);setMenuBar(menuBar);setSize(new Dimension(400, 400);this.addWindowListener(new WindowAdapter() public void windowClosing(WindowEvent e) CalcultorFrame.this.windowClosed(););panel = new CalcPanel();add(panel, BorderLayout.CENTER);protected void windowClosed() System.exit(0);第三个CalcPanel类：package Calculator;import java.awt.BorderLayout;import java.awt.Button;import java.awt.Color;import java.awt.GridLayout;import javax.swing.JPanel;import javax.swing.JTextField;public class CalcPanel extends JPanel private static final long serialVersionUID = 1L;JTextField textField;JPanel buttonPanel;Button numButtons;Button btnDot, btnPosMinus, btnBackspace, btnDivide1, btnEqual, btnClear;Button btnAdd, btnSubtract, btnMultiply, btnDivide;Button btnX2, btnX3, btnXY, btnSin, btnCos, btnTan, btnSqrt, btnN, btnLeft,btnRight;CalcControler controler;public CalcPanel() textField = new JTextField(34);controler = new CalcControler(textField);textField.setHorizontalAlignment(JTextField.RIGHT);textField.setEditable(false);buttonPanel = new JPanel();numButtons = new Button10;for (int i = 0; i 10; i+) numButtonsi = new Button( + i);btnDot = new Button(.);btnPosMinus = new Button(+/-);btnBackspace = new Button(Backspace);btnDivide1 = new Button(1/x);btnEqual = new Button(=);btnClear = new Button(C);btnAdd = new Button(+);btnSubtract = new Button(-);btnMultiply = new Button(*);btnDivide = new Button(/);btnLeft = new Button();btnRight = new Button();btnX2 = new Button(x2);btnX3 = new Button(x3);btnXY = new Button(xy);btnSqrt = new Button(sqrt);btnSin = new Button(sin);btnCos = new Button(cos);btnTan = new Button(tan);btnN = new Button(n!);buttonPanel.setLayout(new GridLayout(6, 5);buttonPanel.add(btnLeft).setForeground(Color.black);buttonPanel.add(btnRight).setForeground(Color.black);buttonPanel.add(btnSin).setForeground(Color.black);buttonPanel.add(btnCos).setForeground(Color.black);buttonPanel.add(btnTan).setForeground(Color.black);buttonPanel.add(btnX2).setForeground(Color.black);buttonPanel.add(btnX3).setForeground(Color.black);buttonPanel.add(btnXY).setForeground(Color.black);buttonPanel.add(btnSqrt).setForeground(Color.black);buttonPanel.add(btnN).setForeground(Color.black);buttonPanel.add(numButtons7).setForeground(Color.black);buttonPanel.add(numButtons8).setForeground(Color.black);buttonPanel.add(numButtons9).setForeground(Color.black);buttonPanel.add(btnAdd).setForeground(Color.black);buttonPanel.add(btnClear).setForeground(Color.black);buttonPanel.add(numButtons4).setForeground(Color.black);buttonPanel.add(numButtons5).setForeground(Color.black);buttonPanel.add(numButtons6).setForeground(Color.black);buttonPanel.add(btnSubtract).setForeground(Color.black);buttonPanel.add(btnBackspace).setForeground(Color.black);buttonPanel.add(numButtons1).setForeground(Color.black);buttonPanel.add(numButtons2).setForeground(Color.black);buttonPanel.add(numButtons3).setForeground(Color.black);buttonPanel.add(btnMultiply).setForeground(Color.black);buttonPanel.add(btnDivide1).setForeground(Color.black);buttonPanel.add(numButtons0).setForeground(Color.black);buttonPanel.add(btnDot).setForeground(Color.black);buttonPanel.add(btnPosMinus).setForeground(Color.black);buttonPanel.add(btnDivide).setForeground(Color.black);buttonPanel.add(btnEqual).setForeground(Color.black);for (int i = 0; i 10; i+) numButtonsi.addActionListener(controler);btnAdd.addActionListener(controler);btnBackspace.addActionLi